Sets and frozenset

set

allows list, tuple, set, frozenset, deque, or generators and casts to a set; when a generic parameter is provided, the appropriate validation is applied to all items of the set

typing.Set

handled the same as set above

frozenset

allows list, tuple, set, frozenset, deque, or generators and casts to a frozen set; when a generic parameter is provided, the appropriate validation is applied to all items of the set

typing.FrozenSet

handled the same as frozenset above

from typing import FrozenSet, Optional, Set

from pydantic import BaseModel


class Model(BaseModel):
    simple_set: Optional[set] = None
    set_of_ints: Optional[Set[int]] = None

    simple_frozenset: Optional[frozenset] = None
    frozenset_of_ints: Optional[FrozenSet[int]] = None


print(Model(simple_set={'1', '2', '3'}).simple_set)
#> {'1', '2', '3'}
print(Model(simple_set=['1', '2', '3']).simple_set)
#> {'1', '2', '3'}
print(Model(set_of_ints=['1', '2', '3']).set_of_ints)
#> {1, 2, 3}

m1 = Model(simple_frozenset=['1', '2', '3'])
print(type(m1.simple_frozenset))
#> <class 'frozenset'>
print(sorted(m1.simple_frozenset))
#> ['1', '2', '3']

m2 = Model(frozenset_of_ints=['1', '2', '3'])
print(type(m2.frozenset_of_ints))
#> <class 'frozenset'>
print(sorted(m2.frozenset_of_ints))
#> [1, 2, 3]